JP4632906B2 - Fire hose and method for manufacturing the same - Google Patents

Description

  The present invention relates to a fire hose and a method for manufacturing the same, and more particularly to a fire hose with improved handling and a method for manufacturing the same in a fire extinguishing activity at a fire site.

  Conventionally, fire hoses generally have a rubber or synthetic resin lining formed on the inner surface of a jacket in which warp yarns and weft yarns are woven into a cylindrical shape. As the weft yarns in the jacket, filament yarns with high strength are used. As the warp yarn, a spun yarn or a bulky processed yarn excellent in durability against friction and trauma is used, and the warp yarn is often covered with the warp yarn by using many warp yarns.

  In general, the filament yarn has higher strength than the spun yarn and the bulky processed yarn, and the elongation against the tensile load is small. For this reason, if filament yarn is used as the warp of the jacket, the elongation of the hose during pressurization can be reduced, and the hose meandering and twisting during pressurization can be suppressed, which makes it an excellent fire hose. I can expect.

  However, when filament yarn is used as the warp yarn of the jacket, the entire surface of the hose is covered with the filament yarn of the warp yarn, but the filament yarn has a smooth bundle of filaments extending in the length direction. When the filament yarns come into contact with each other, the frictional resistance is small and the sliding is extremely easy.

  Fire hoses are generally coiled and stored, and at the fire site, the coiled fire hoses are carried by people to the required locations, where they are stretched straight and connected in multiples for use. However, if the surface of the hose is covered with filament yarn as described above, slipping easily occurs between the layers of the coil, and the coil collapses or cannot be straightened when being carried by hand. Often to do.

Japanese Utility Model Publication No. 47-38242 discloses that a set of a spun yarn and a filament yarn thinner than the spun yarn is used as a warp of a jacket. However, in this fire hose, in order to prevent the filament yarn from being exposed on the surface of the jacket, the thickness of the filament yarn must be 3/4 or less of the span yarn, and the jacket is mainly composed of the filament yarn. It is not possible.
Japanese Utility Model Publication No. 47-38242

  The present invention has been made in view of such circumstances, and by using the filament yarn as the warp of the jacket as a main component, it is possible to suppress the elongation at the time of pressurization of the fire hose and to add the filament yarn to the warp. The purpose is to reduce slipperiness caused by use and to improve handling.

  Thus, the fire hose of the present invention is a fire hose in which a flexible rubber or synthetic resin lining is formed on the inner surface of a jacket formed by weaving warps and wefts in a cylindrical shape. The filament yarn and the spun yarn or the bulky processed yarn are alternately used as the warp yarn in each block.

  In the fire hose of the present invention, the abdomen and ears in the state where the jacket is folded flat are used as adjacent blocks, and filament yarns and span yarns or bulky processed yarns are alternately used as the warps in the blocks. It can be.

  In the fire hose of the present invention, the spun yarn or bulky processed yarn is preferably 20 to 50% of the total number of warp yarns constituting the jacket. In the present invention, the surface of the jacket can be covered with rubber or synthetic resin.

  The fire hose manufacturing method of the present invention supplies a large number of warp yarns radially from the periphery toward the annular weave, and supplies the weft yarn from the shuttle rotating around the exit to the exit, In a method of weaving warp yarns and weft yarns to form a cylindrical jacket, the warp yarns are divided into a plurality of blocks, and filament yarns and span yarns or bulky processed yarns are alternately used as warp yarns belonging to each block. It is characterized by.

  In the production method of the present invention, it is preferable that the tension of the spun yarn or the bulky processed yarn out of the warp yarn supplied toward the weave is larger than the tension of the filament yarn. The tension of the spun yarn or bulky processed yarn is preferably 5 to 20% greater than the tension of the filament yarn.

  According to the present invention, since the filament yarn and the spun yarn or the bulky processed yarn are respectively used as the warp yarn constituting the jacket of the fire hose, it is possible to use a sufficient amount of filament yarn as the jacket warp yarn. The hose is less stretched when pressurized, and the spun yarn is exposed on both sides of the fire hose when it is folded. When the yarns come into contact with each other, an appropriate frictional resistance is generated, and the hose is easy to handle and has good workability without being excessively slippery.

  According to the invention of claim 3, since more than half of the number of warp yarns of the jacket is filament yarn, the filament yarn can sufficiently suppress the elongation of the hose at the time of pressurization, and the elongation at the time of pressurization. Deformation such as distortion and twist can be greatly reduced.

  According to the invention of claim 4, by covering the jacket surface with rubber or synthetic resin, slippage of the slippery filament yarn is prevented, and the slipperiness when wound on the coil is reduced. Thus, the handleability can be further improved.

  According to the fire hose manufacturing method of the present invention, the warp yarn is divided into a plurality of blocks when the jacket is woven by the annular loom, and the filament yarn and the spun yarn or the bulky processed yarn are alternately arranged for each block. Since it is used, the fire hose of the present invention can be easily manufactured.

  Further, according to the inventions of claims 6 and 7, among the warp yarns supplied to the circular loom, the tension of the spun yarn or bulky processed yarn is larger than the tension of the filament yarn. The processed yarn is woven in the state of being stretched from the beginning, and the filament yarn and the spun yarn or the bulky processed yarn are aligned at the time of pressurization, and even if different types of yarn with different elongation behavior are used in combination, the fire hose The pressure resistance is not lowered and the performance can be ensured.

  1 to 3 show a fire hose 1 according to the present invention. The fire hose 1 has a lining 3 formed on the inner surface of a jacket 2, and the jacket 2 has a weft thread 4 and a warp thread 5. Are woven in a cylindrical shape.

  Thus, in FIG. 1, the warp yarn 5 of the jacket 2 is divided into four blocks a to d, the warp yarns 5 of the blocks a and c are made of filament yarns 5a, and the warp yarns 5 of the blocks b and d are spanned. It consists of a thread 5b. In addition, the warp yarn 5 of the block b and the block d can use a bulky processed yarn instead of the span yarn.

  In FIG. 1, all of the four blocks a to d are divided into approximately the same width, but the blocks a and c using the filament yarn 5a are replaced with the blocks b and d using the span yarn 5b. It is preferable to make it wide. The number of span yarns 5b is suitably 20 to 50% of the total number of warp yarns 5.

  FIGS. 2 and 3 show a state in which the fire hose 1 is folded flat. In FIG. 2, the warp yarn 5 made of the filament yarn 5a is located on the abdomen of the jacket 2 and made of the span yarn 5b. The warp yarn 5 constitutes an ear part. In FIG. 3, the warp yarn 5 made of the spun yarn 5b is positioned on the abdomen of the jacket 2 and the warp yarn 5 made of the filament yarn 5a constitutes the ear portion, contrary to FIG.

  Although the present invention includes both the states shown in FIGS. 2 and 3, generally, in a state where the fire hose is folded and wound in a coil shape, the abdomen overlaps with other hose portions to protect each other. Since the ear is always exposed to the outside, it is susceptible to friction and easily damaged. Therefore, it is preferable that the spun yarn 5b having excellent wear resistance is folded in the state shown in FIG.

  4 and 5 show an apparatus for weaving the jacket 2 of the fire hose 1 of the present invention. This device is an annular loom 6 in which a weaving port 7 for weaving a jacket 2 is formed in the center, and warp yarns 5 opened by an opening device 8 toward the weaving port 7 are supplied radially and opened. Since the shuttle 9 containing the weft thread 4 rotates between the warp threads 5, the weft thread 4 supplied from the shuttle 9 and the warp thread 5 are woven at the weaving port 7, and the cylindrical jacket 2 is woven. is there.

  In this apparatus, the warp yarn 5 is supplied to the opening device 8 by the warp yarn supply device 16 from around the annular loom 6. Reference numeral 10 denotes a supply drum wound with a predetermined number of warp yarns 5. The warp yarn 5 fed out from the supply drum 10 is sent to a tension device 12 by a feed roller 11, and the tension device 12 applies a predetermined tension. It is arranged and supplied to the opening device 8.

  In the tension device 12, the warp yarn 5 suspended between the feed roller 11 and the receiving roller 13 is suspended on a swingable dancing roller 14, and a weight 15 is suspended on the dancing roller 14. The warp yarn 5 is supplied to the opening device 8 in a state where a tension corresponding to the weight of the dancing roller 14 and the weight 15 is applied.

  Thus, in the drawing, four warp yarn supply devices 16 are installed around the circular loom 6, and in the two warp yarn supply devices 16a and 16c facing each other, the filament yarn 5a is used as the warp yarn 5. In the two warp yarn supply devices 16b and 16d, the span yarn 5b is used as the warp yarn 5, and the warp yarns 5 are supplied from the warp yarn supply devices 16 to the two opening devices 8, respectively.

  In this case, in the warp supply devices 16b and 16d using the spun yarn 5b, a weight that is heavier as the weight 15 in the tension device 12 is used than in the warp supply devices 16a and 16c using the filament yarn 5a. The tension acting on 5 is increased. As for the weight 15 per warp yarn 5, it is appropriate that the former is 5 to 20% larger than the latter.

  In FIG. 5, an equal number of warp yarns 5 are supplied from each warp yarn supply device 16, but the number of filament yarns 5a is preferably larger than that of span yarns 5b. When the difference between the two is small, the supply drum 10 of the warp supply devices 16a and 16c for supplying the filament yarn 5a is more than the supply drum 10 of the warp supply devices 16b and 16d for supplying the span yarn 5b. The warp yarn 5 may be wound.

  However, when providing a greater difference in the ratio of the number of the two, for example, the filament yarn 5a is supplied to each of the three consecutive opening devices 8 that face each other out of the eight opening devices 8, and the remaining one opening that faces each other. By supplying the spun yarn 5b to the device 8, the number of yarns can be adjusted.

  Even in this case, the weight 15 of the tension device 12 differs between the filament yarn 5a and the span yarn 5b as described above, and the amount of yarn fed from the feed roller 11 changes accordingly. Mixing and supplying the filament yarn 5a and the spun yarn 5b in the warp yarn supply device 16 on the table should be avoided.

[Example]
As warp yarns, 122 yarns made by aligning two strands of two 1000d polyester filament yarns and 122 yarns twisting eight 20th polyester spun yarns are used. Then, half of the filament yarn and the span yarn were arranged at positions facing each other. Further, as the weft yarn, a yarn obtained by twisting three 1650d polyester filament yarns was used, and 55 weft yarns were driven into the warp yarn in 10 cm to form a jacket having an inner diameter of 65 mm. The jacket was lined with a soft polyurethane resin to produce a fire hose.

[Comparative Example 1]
As the warp yarn, 244 yarns made by arranging two twisted filaments of 1000d polyester filament are used, and as the weft yarn, a yarn twisted of three 1650d polyester filament yarns is used. A 55 mm inner diameter jacket was woven by driving 55 wefts into the warp yarn in 10 cm, and a flexible polyurethane resin lining was applied to the jacket to produce a fire hose.

[Comparative Example 2]
As the warp yarn, 244 yarns of eight 20th polyester spun yarns twisted together are used, and as the weft yarn, a yarn of three twisted 1650d polyester filament yarns is used, and this warp yarn is used as the warp yarn. In contrast, 55 jackets with an inner diameter of 65 mm were woven into 10 cm in between. The jacket was lined with a soft polyurethane resin to produce a fire hose.
In addition, the said Example and Comparative Examples 1 and 2 have the performance almost the same in theory, Comprising: It designs as a fire hose whose normal pressure is 1.3 MPa.

[performance test]
Thus, the following performance was measured for the fire hose of the above examples and comparative examples.
(1) Rate of change in length and diameter during pressurization Measurement was performed in a state where an internal pressure of 1.3 MPa was applied to a fire hose.
(2) Breaking pressure [Direct cutting] The breaking pressure was measured in a state where the fire hose was straightened.
[Bending] The breaking pressure was measured with the fire hose bent 180 degrees. In addition, about the Example, it measured about the case where it bent so that a filament yarn might become a belly, and the case where it bent so that a span yarn might become a belly.
(3) Sliding property Place the fire hose on the same fire hose and asphalt, place a 4 kg weight on the fire hose, and drag and move the fire hose in that state. When the load was measured.

[Test results]
The test results are shown in Table 1.

[Evaluation]
Compared to the comparative example, the length and diameter changes during press in Examples are intermediate values between Comparative Example 1 and Comparative Example 2, and all the warp yarns are filament yarns. Although not as much as 1, the change in length is smaller than that of Comparative Example 2 using a spun yarn, the elongation at the time of pressurization is small, and meandering and twisting are small.

  Moreover, the breaking pressure is equivalent to Comparative Examples 1 and 2 in direct cutting, and the performance as a fire hose is equivalent, and the bending break is slightly inferior to Comparative Example 1 consisting only of filament yarn. However, the performance is sufficiently high as compared with Comparative Example 2.

  And the numerical value of the sliding property between fire hoses is much larger than the comparative example, the friction resistance between fire hoses is large, the coil does not collapse when the hose is wound in a coil shape, and the handling property is extremely It will be good. In addition, the slipperiness against asphalt is the same in both the comparative example and the handling on the road surface is comparable.

  Although it seems strange that it is superior to the comparative example 2 using the span yarn as the warp yarn, in the embodiment, the span yarn is used only for both ears of the jacket, and the warp yarn of the abdomen is a filament yarn. For this reason, it is considered that when a load is applied, the frictional resistance concentrates only on the spun yarn portion, and on the contrary, it is difficult to slip.

Cross section of fire hose of the present invention Cross-sectional view of the fire hose of the present invention folded so that the warp of the filament yarn becomes the abdomen The cross-sectional view of the fire hose of the present invention folded so that the warp of the spun yarn becomes the abdomen Central longitudinal sectional view of an apparatus for weaving a fire hose of the present invention Plan view of an apparatus for weaving a fire hose of the present invention

Explanation of symbols

1 Fire Hose 2 Jacket 3 Lining 4 Weft 5 Warp 5a Filament Yarn 5b Spun Yarn

Claims (7)

In the fire hose (1) formed by forming a flexible rubber or synthetic resin lining (3) on the inner surface of the jacket (2) formed by weaving the warp yarn (5) and the weft yarn (4), The jacket (2) is divided into a plurality of blocks in the circumferential direction, and the filament yarn (5a) and the span yarn (5b) or a bulky processed yarn are alternately used as the warp yarn (5) in each block. Fire hose When the jacket (2) is folded flat, the abdomen and ears are adjacent blocks, and the filament yarn (5a) and the spun yarn (5b) or the bulky processed yarn are alternately placed on the block as the warp yarn (5), respectively. The fire hose according to claim 1, wherein the fire hose is used. The fire hose according to claim 1 or 2, wherein the spun yarn (5b) or the bulky processed yarn is 20 to 50% of the total number of warp yarns (5) constituting the jacket (2). The fire hose according to claim 1, 2 or 3, wherein the surface of the jacket (2) is coated with rubber or synthetic resin. A large number of warp yarns (5) are fed radially from the periphery toward the annular weave, the weft yarn (4) is fed from the shuttle rotating around the weave toward the weave, and the warp yarn (5) In the method of weaving the weft yarn (4) to form the cylindrical jacket (2), the warp yarn (5) is divided into a plurality of blocks, and the warp yarn (5) belonging to each block is used as a filament yarn (5a) and A method for manufacturing a fire hose characterized by alternately using a spun yarn (5b) or a bulky processed yarn The warp yarn (5) supplied toward the weaving port is characterized in that the tension of the spun yarn (5b) or the bulky processed yarn is made larger than the tension of the filament yarn (5a). Method of fire hose The fire hose manufacturing method according to claim 5, wherein the tension of the spun yarn (5b) or the bulky processed yarn is 5 to 20% greater than the tension of the filament yarn (5a).

Images